Now you Know

Loudness :
Office noise : 60 db

Loudness :
Children playing : 60-80 db

Loudness :
Lawn mower : 60-80 db

Loudness :
Vacuum cleaner : 80 db

Loudness :
Traffic noise : 60-90 db

Loudness :
Sports car : 80-95 db

Loudness :
Heavy truck traffic : 90-100 db

Loudness :
Loud radio : 100 db

Loudness :
Motor cycle : 105 db

Loudness :
Pneumatic drill : 110 db

Loudness :
Thunder storm : 110 db

Loudness :
Rock music : 120 db

Loudness :
Aircraft noise : 90-120 db

Loudness :
Jet takeoff(at 100 meter distance) : 120 db

Loudness :
Jet engine(at 25 meter distance) : 140 db

Loudness :
Space vehicle launch (from a short distance) : 140-170 db

Medical Invention : malaria parasite
Inventor : ronald rose

Medical Invention : anti-polio vaccine
Inventor : salk, jonas e.

Medical Invention : chloroform
Inventor : simpson and harrison

Medical Invention : streptomycin
Inventor : waksman

Discovery
Cat Scanner
Discoverer/Inventor : godfrey hounsfield (britain)
Year : 1968 .. More >>